Elemental Map

The 3-window technique for elemental mapping requires three energy-filtered images; two positioned before the ionization edge (pre-edge images), and one positioned just after the edge.

1. To acquire an elemental map, specify:

   1. Element of interest

   2. Camera parameters

   3. Slit width and filter energies to be used for the pre- and post-edge acquisitions

2. Access the Configure Elemental Map dialog will vary based on the mode you choose.

   1. SingleMap mode – Press the Select Elemental Map button

   2. MultiMap mode – Specify via the MultiMap Configuration dialog

3. Indicate parameters within the Configure Elemental Map dialog.

   1. Window Settings (eV)

      1. Edge – Specify the edge you want to use for ratio mapping

      2. Pre-edge 1 and 2 – Indicate the energy loss setting that the filter will use to acquire the pre-edge image

      3. Post-edge – Designate the energy loss setting that the filter will use to acquire the post-edge image

      4. Slit width – Specify the energy-selecting slit width you want to use for both the pre- and post-edge acquisitions

      5. Setup – Allows you to recall pre-saved or default settings for a particular element

   2. Detector – Specify the detector settings you want to use

   3. Spectrum display – Generates and displays a simulated spectrum at the top of the dialog to give you visual feedback regarding the feature shape and the selected acquisition window positions

4. Click Capture.

The routine will

• Acquire a post-edge image followed by the two pre-edge images

• Correct for any spatial drift between the images, if specified

• Compute and display the elemental map